{
  "manageEntity": {
    "action": "Save",
    "entityId": "760756822",
    "entityType": "Track",
    "nonce": "0x91a861553546f4c2acfc0aa549658acea900fc98a0b41580a73e56b98226a987",
    "signature": "0x1c345e419117daadf09231e8dd9fe4071a9c3b644a4d06c8d045d233c44fc1d66ea3efb3e62761ee90965e1fb012a011890074c18fbc463ecef2fee0be6e1f841c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}